IAccessible2 state not defined for input type checkbox.

content/browser/accessibility/accessibility_tree_formatter_utils_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/accessibility/accessibility_tree_formatter_utils_win.h"
 
 #include <oleacc.h>
 
 #include <map>
 #include <string>
@@ skipping 179 matching lines @@
   IA_STATE_MAP(SELECTABLE)
   IA_STATE_MAP(SELECTED)
   IA_STATE_MAP(SELFVOICING)
   IA_STATE_MAP(SIZEABLE)
   IA_STATE_MAP(TRAVERSED)
   IA_STATE_MAP(UNAVAILABLE)
 
   // IAccessible2 states.
   IA2_STATE_MAP(IA2_STATE_ACTIVE)
   IA2_STATE_MAP(IA2_STATE_ARMED)
+  IA2_STATE_MAP(IA2_STATE_CHECKABLE)
   IA2_STATE_MAP(IA2_STATE_DEFUNCT)
   IA2_STATE_MAP(IA2_STATE_EDITABLE)
   IA2_STATE_MAP(IA2_STATE_ICONIFIED)
   IA2_STATE_MAP(IA2_STATE_INVALID_ENTRY)
   IA2_STATE_MAP(IA2_STATE_MANAGES_DESCENDANTS)
   IA2_STATE_MAP(IA2_STATE_MODAL)
   IA2_STATE_MAP(IA2_STATE_MULTI_LINE)
   IA2_STATE_MAP(IA2_STATE_REQUIRED)
   IA2_STATE_MAP(IA2_STATE_SELECTABLE_TEXT)
   IA2_STATE_MAP(IA2_STATE_SINGLE_LINE)
@@ skipping 46 matching lines @@
   }
 }
 
 base::string16 IAccessible2StateToString(int32 ia2_state) {
   std::vector<base::string16> strings;
   IAccessible2StateToStringVector(ia2_state, &strings);
   return JoinString(strings, ',');
 }
 
 }  // namespace content